Table 2 Radiotherapy characteristics
Characteristics | NFRT (n = 2394) n (%) | HFRT (n = 1124) n (%) | Total (n = 3518) n (%) |
|---|---|---|---|
Radiotherapy technique | |||
Conformal 3D | 1878 (78.4) | 1000 (89.0) | 2878 (81.8) |
IMRT | 516 (21.6) | 124 (11.0) | 640 (18.2) |
Total dose | |||
HFRT: 40.05 Gy (15 Fr × 2.67 Gy) | – | 508 (45.2) | 508 (14.4) |
NFRT: 50 Gy (25 Fr × 2.0 Gy) | 945 (39.5) | – | 945 (26.9) |
50.05 Gy (HFRT + Boost 4 Fr × 2.5 Gy) | – | 496 (44.1) | 496 (14.1) |
53.4 Gy (HFRT + Boost 5 Fr × 2.67 Gy) | – | 14 (1.3) | 14 (0.4) |
56.05 Gy (HFRT + Boost 8 Fr × 2.0 Gy) | – | 60 (5.3) | 60 (1.7) |
66 Gy (NFRT + Boost 8 Fr × 2.0 Gy) | 1378 (57.5) | – | 1378 (39.2) |
64.4 Gy (28 Fr × 1.8 (NFRT); 28 Fr × 2.3 Gy SIB) | 18 (0.8) | – | 18 (0.5) |
68.32 Gy (28 Fr × 1.8 (NFRT); 28 Fr × 2.44 Gy SIB) | 21 (0.9) | – | 21 (0.6) |
Other | 32 (1.3) | 46 (4.1) | 78 (2.2) |
Boost | |||
No | 945 (39.5) | 508 (45.2) | 1453 (41.3) |
Yes/sequential boost | 1378 (57.5) | 570 (50.7) | 1948 (55.4) |
Yes/SIB | 39 (1.6) | 39 (1.1) | |
Other | 32 (1.4) | 46 (4.1) | 78 (2.2) |
Dose per fraction (Gy) | |||
2 | 2394 (100) | – | 2394 (68.1) |
> 2.2 (equal to 2.67) | – | 1124 (100) 1079 (96.0) | 1124 (31.9) 1079 (30.7) |